The BGS Lexicon of Named Rock Units — Result Details

Ugie Clay Formation

Computer Code: UGCL Preferred Map Code: UC
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: A typically reddish brown, but locally dark grey, black, brown and yellowish brown, laminated clay, silt and fine-grained sand, with localised black organic laminae formed of reworked Jurassic material.
Definition of Lower Boundary: Generally a sharp, undulating, draped, unconformable contact with the gravelly clayey sand diamictons (tills) of the East Grampian Glacigenic Subgroup, but locally a sharp, undulating, draped, unconformable contact with deposits of glaciofluvial gravel with erect pebbles at the top, probably formed in a periglacial environment.
Definition of Upper Boundary: Generally a sharp, undulating, draped, erosional and unconformable contact with glaciofluvial or alluvial sand and gravel. Locally the boundary is seen as a sharp, planar, unconformable glacitectonic contact with red clayey diamictons (deformation tills, glaci- tectonites) of the Logie-Buchan Glacigenic Subgroup towards the North Sea coast.
Thickness: To 20m
Geographical Limits: Buchan, north-east Scotland, between Peterhead, Ellon and Aberdeen.
Parent Unit: Logie-Buchan Glacigenic Subgroup (LBD)
Previous Name(s): "Red Series" Clays Or Glaciolacustrine Deposits (-2515)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Abandoned claypit at Errolston, Cruden Bay. Merrit et al., 2000, 2003; Ugie Valley. 
Partial Type Section  Stream section 400m northnorthwest of Balluss Bridge, Mintlaw. Merrit et al., 2000, 2003; Ugie Valley. 
Reference(s):
Merritt, J W, Auton, C A, Connell, E R, Hall, A M and Peacock, J D. 2003. The Cainozoic geology and landscape evolution of north-east Scotland. Memoir of the British Geological Survey, Sheets 66E, 67, 76E, 77, 86E, 87W, 87E, 95, 96W, 96E and 97 (Scotland) 
Peacock, J D. 1984. Errolston. 108-109 in Buchan Field Guide. Hall A M (editor). (Cambridge: Quaternary Rresearch Association.) 
Connell, E R, Hall, A M, Shaw, D and Riley, L A. 1985. Palynology and significance of radiocarbon dated organic materials from Cruden Bay Brick Pit, Grampian Region, Scotland. Quaternary Newsletter, Vol.47, 19-25. 
Hall, A M and Connell, E R. 1991. The glacial deposits of Buchan, northeast Scotland. 129-136 in Ehlers, J, Gibbard, P L and Rose, J (editors), Glacial Deposits in Great Britain and Ireland. (Rotterdam: Balkema.) 
Merritt, J W, Connell, E R and Bridgland, D R (editors). 2000. The Quaternary of the Banffshire Coast and Buchan; Field Guide. (London: Quaternary Research Association.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S077 S076